The story follows children who travel through time and visit strange worlds in order to find their missing scientist father.

Lee reported impressed Disney executives with her take on the project, emphasizing a strong female-driven narrative and creative approaches to the science fiction and world-building elements of the book.

No director is presently attached, but Jim Whitaker and Catherine Hand will produce. Lee replaces Jeff Stockwell who initially tackled the screenplay when the project was announced in 2010.